collinge: non-operculate land and freshwater molluscs. 83 



Hapalus jousseaumei, de Morg. : Bull. Soc. Zool. Fr., 1885, vol. x, 



p. 24, pi. i, figs. 2a, ih. 

 Hah. — Kwala Aring, State of Kelantan. 



PUPIDAE. 

 Hypselostoma, Bens. 

 Hypselostoma laidlawi. n. sp. 



PI. V, figs. 29, 30. 



Shell dextral, conical, with last whorl dorsally grooved, surface 

 smooth, deeply umbilicated, whorls 5, regularly increasing, aperture 

 CD shaped, armature consists of four teeth, a dorsal and ventral one 

 situated on the upper and lower border of the peristome, and two 

 smaller internal teeth, one on the right and one on the left of the 

 peristomial teeth ; peristome thin, slightly reflected. 



Alt. and diam. i millim. 



Hah. — Biserat Caves, State of Jalor. 



STENOGYRIDAE. 

 Prosopeas, Morch. 

 Prosopeas tehehelense, deMor;^'. 



Stenogyra fcliehelenxis, de Morg. : Le Natural., 1885, p. 69, 

 Bull. Soc. Zool. Fr., 1885, vol. x, p. 40, pi. ii, figs, ya, "jh. 



SfewM/yra sweffenhatni, de Morg. : Bull. Soc. Zool. Fr., 1885, 

 vol. X, p. 41, pi. ii, figs. 6a, 6h. 



Stenogyra (Suhulina) trheheleimx, Mlldff. : J. As. Soc. Bengal, 

 1887, vol. Iv, p. 304. 



Stenogyra (Opea^) ? terehraJt's, Theob. (? n. sp.) : G. Nevill, 

 Hand-list Moll. Ind. Mus., 1878, p. 166. 



Prosopeas tehehelense, Mlldff. : P.Z.S., 1891, p. 337. 



Hah. — Gunong Inas, 3,000 ft.. State of Perak ; Belimbing (from 

 jungle floor, at base of cliff), State of Ligeh ; Biserat, State of Jalor. 



Mollendorff (20, p. 337) has expressed the opinion that the 

 Stenogyra tchehelensis and S. s/reftenhami of deMorgan are the same, 

 the latter being only a slight variation. After examining a large series 

 of specimens from the above localities, I can fully endorse this opinion. 



The eggs of this mollusc are exceedingly large for the size of the 

 animal, and are enclosed in a hard calcareous shell. All the eggs in 

 the region of the free-oviduct had a well developed shell, whilst those 

 in the lower portion of the oviducal canal had not. 



Specimens having eight whorls in the shell were found to be 

 sexually mature; the largest shell met with was one with twelve whorls, 



